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Run results for:
InstanceOf vs String type
Measure the performance of instanceOf operator vs comparing a basic string type.
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Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 16_0_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 16
Operating system:
iOS 16.0.3
Device Platform:
Mobile
Date tested:
2 years ago
Test name
Executions per second
instanceof
3938738.5 Ops/sec
string type
9972476.0 Ops/sec
string type + undefined
3519422.5 Ops/sec
property
3503875.2 Ops/sec
HTML Preparation code:
<script> class TestClass { constructor() { this.a = 2; this.t = 'mesh'; } } </script>
Script Preparation code:
var obj = new TestClass();
Tests:
instanceof
obj instanceof TestClass;
string type
obj.t === 'mesh'
string type + undefined
obj.t !== undefined
property
obj.a !== undefined